The aim of this study was to determine whether there is an effect of mobile
phone electromagnetic field emissions on the human electroencephalograph
(EEG). EEG recordings from ten awake subjects were taken during exposure to
radiofrequency (RF) emissions from a mobile phone positioned behind the
head.

Two experimental trials were conducted. In the first trial, RF
exposures were generated by a GSM mobile phone with the speaker disabled and
configured to transmit at full-radiated power. During the second trial,
exposures were generated by a non-modified GSM mobile phone in active
standby mode. For each trial, subjects were exposed in five minute intervals
to a randomized, interrupted sequence of five active and five sham
exposures.

The experiment was conducted under single-blind conditions. The
average EEG band power in active exposure recordings was compared to
corresponding sham recordings. Statistical tests indicated significant
difference in the full-power mode trial within the EEG alpha (8-13 Hz) and
beta (13-32 Hz) bands.

A subsequent statistical analysis of median spectral
power in discrete EEG rhythms revealed significant differences in 7 of the
32 distinct frequencies overall. In conclusion, the results of this study
lend support to EEG effects from mobile phones activated in talk-mode.